Packing for hydraulic presses



2 sheets-sheet 1 w. B. WARE PACKING FOR HYDRAULIC PRESSES Filed Oct. 22, 1956 :1: 237.1.

Aug. 2, 1938.

INVENTOR. V 7/15. mm,

\5 BY I WmNlfl S. b

Aug.- 2, 1938. w. B. WARE 2,125,701

' PACKING FOR-HYDRAULIC PRESSES Filed Oct. 22, 19 36 2 Sheets-Sheet 2 1 INVENTOR.

W Ware,

' 4 I I W ATTORNEYS.

Patented Aug. 2, i938 p UNETED STATES PATENT @FFICE PACKING FOR HYDRAULIC PRESSES William B. Ware, Memphis, Tenn.

Application October 22, 1936, Serial No. 10?,d66

2 Claims. (Cl. 288-4) This invention relates to an improved packing Figure 3 is an enlarged view vof ends of the for a hydraulic press and one object of the invenpacking showing the same separated and in position isto provide a hydraulic press of an improved tion to be brought together;

construction wherein the cylinder has an iml Figure 4 is a view in side elevation of the end 5 proved construction which will cause the packing portions of the ring shown in Figure 3;

ring to be held tightly about the ram and likeli- Figure 5 is a perspective view of one end portion hood of leakage about the ram eliminated. of the packing ring;

Another object of the invention is to provide the Figure 6 is a perspective view of the other end cylinder with means whereby liquid forced under portion of the packing ring; and

10 pressure into the lower portion of the cylinder Figure 7 is a sectional view taken transversely 1 may have a portion conducted to the pocket or through the packing ring. I recess in the wall of the cylinder in which the The hydraulic press illustrated in Figure 1 is for packing ring is seated and thus cause the packing use when extracting cotton seed oil and for simiring to be compressed about the ram. It will thus lar pressing operations which require exceedingly Id be seen that as pressure applied under the ram is heavy pressure such as four or live thousand increased the pressure about the packing ring pounds or more to the square inch and has a will also be increased and a tighter seal provided cylinder l formed of strong metal and defining a between the packing ring and the ram surrounded chamber 2- into which liquid under pressure is thereby. v admitted through a pipe 3 so that a ram t which Another object of the invention. is to so form is slidably received in the chamber may be forced 20 the packing ring that a relatively large surface upwardly. The usual flange 5 is provided about will be presented for action bythe liquid under the upper end of the cylinder and there have also pressure and to also so form the packing that been provided the usual columns ti extending upwhen it is seated in the ring receiving groove or wardly from the flange with their lower end porrecess of the cylinder, space to receive the liquid tions extending through openings 1 in the flange 25 under pressure will be provided. and secured by nuts t. l

It is another object of the invention to so form A recess a is formed in the annular wall of the the packing ring that when it is subjected to cylinder to receive the packing ring ill and special pressure its portion facing the inner wall of the attention is called to the fact that a passage M is ad recess d a t d upon by the liquid under pressure formed vertically in the cylinder at one side of the will be urged towards upper and lower walls of the chamber 2 and formed with side extensions l2 and recess and forced tightly against the same to proit which project towards the chamber, the upper vide a tight seal. 1 side extension opening into the recess or ring Another object of the invention is to provide an receiving groove 9 and the lower extension openlmproved joint between end portions of the p c ing into the lower portion of the chamber which is me rin including m n f r i ht y ealing space of enlarged diameter so that a portion of the w n abutting p r on of v pping en of liquid forced into the chamber through the pipe the Ting. v 3 may enter the passage Ill through the lower side Still another object of the invention resides in extension g3 and move 'upwardly through the providing a construction which is Simple and passage and into the recess 9 through the upper 49 able, inexpensive to manufacture and which side extension it. A plug M is threaded into the will 9 very emcient in 1 upper end of the passage H to close the same and Wlth thfase and .numemus other objects in vigw' prevent escape of liquid through the upper end of my invention consists in the novel features of conthe-passage. By providing the passage M and its gi s 'fii l l e $332232? gi rxd t fi $153332 side extensions pressure will applied about the 'tlcularly pointed out in the specification and puking and this Wm be increasedl as l pressure upon the liquid in the chamber 2 is claims. p The invention is illustrated in the accompanyincreased- Therefore as Pressure upon the liquid to 111g drawings wherein; which elevates the ram is increased the packing 50 Figure -1 is a sectional view taken vertically will be forced more tight y about t e ram and through a hydraulic press of the improved conle k b tw n e r m n the p n will be structlon: v prevented. It should alsobe noted that even it Figure 2 is a top plan view of the packing ring the ram or portions of the walls of the. cylinder shown in place in Figure 1; v engaged thereby become worn a tight joint will 5 still be formed and reboring of the cylinder or renewal of the rain will not be necessary.

The ring is of a special construction and referring to Figures 3 through 7 it will be seen that it is of a laminated formation and consists of a plurality of strips I5 of leather, rubber composition or any other suitable material which are secured in face to face contact with each other by Water proof cement. The outer surface of the packing ring which faces the inner wall of the recess or ring seat ii is formed with a recess so that it will be V-shaped in cross section and provide space it between the inner wall of the recess a and the confronting face of the packing ring to receive the liquid which enters the recess through the side extension it of the passage ii. By forming the packing ring with a channeled or substantially V-shaped outer face the surface acted upon by the liquid under pressure in the space iii willbe comparatively large and the packing ring will be held very tightly about the ram. It should also be noted that pressure in the space IE will act upon the upper and lower portions i! of the packing ring and force these reduced portions towards upper and lower walls of the recess 9 and cause the ring to fit tightly against the same to prevent the liquid from leaking about the packing ring between its upper and lower faces and the faces of the recess engaged thereby. The entire force of the liquid in the space i6 will thus be applied to the channeled face of the packing ring and likelihood of leakage eliminated.

In addition to being formed with a channeled outer face the packing ring is also provided with end portions so constructed that a tight joint will bev formed between them when the ring is seated in the recess 9. -Referring to Figures 3 through 6 it will be seen that one end portionof the laminated strip from which the ring is formed is cut to provide a tongue l8 having a diagonally extending free end I8 and a diagonally extending shoulder 20 at its inner end. The other end portion of the laminated strip is also cut to form a tongue 2| corresponding in length to the tongue I! and having a diagonally extending free end 22 and a diagonally extending shoulder 23 at its inner end. By so forming ends of the. packing ring the tongues may be disposed in overlapping relation to each other and the diagonally extending free end of each tongue will be disposed in confronting relation to the diagonally extending shoulder of the other end portion of the ring. Since the tongues have sliding engagement with each other the packing ring may conform to the diameter of the ram and fit tightly about it. It is desired to have spaces between the overlapping end portions of the ring portion of the ring and projects from this end of the ring so that it may overlap the otherend portion of the ring as shown in Figure 2 when i the two ends of the laminated strip forming the ring are brought into engagement with each other to form the ring. The strip is only secured to one end portion of the ring and therefore the ring can expand or contract when necessary but pressure applied by liquid in the space it will cause all portions of the strip to be held firmly against the outer face of the ring and a tight joint will be formed between the overlapped end portions of the ring and leakage will be prevented.

The ring can be very easily mounted in the recess or seat 9 by overlapping the tongues at its ends and after smoothing the free end portion of the strip 26 applying this portion of the ring in the recess. It is then merely necessary to crumple a portion of the ring as indicated by dotted lines at 25 and the ring can be moved into position to spring outwardly into the recess 9 when it is released and allowed to expand. I have therefore provided a hydraulic press having a packing ring of an improved construction. and also so constructed the cylinder that liquid under pressure may enter the ring receiving seat or recess and encircle the ring to force the ring tightly about the ram of the press.

From the foregoing description of the construction of my improved apparatus, the application of the same to use will be readily understood. It will be seen that I have provided a simple, inexpensive and efficient means for carrying out the objects of the invention.

While I have particularly described the elements best adapted to perform the functions set forth, it is obvious that various changes in form, proportion and in the minor details of construction may be resorted to without departing from the spirit or sacrificing any of the principles of the invention.

Having thus described the invention what is claimed is:

l. A packing ring comprising a laminated structure consisting of strips of flexible material adheringly secured in face to face engagement with each other, portions of the strips at their ends being cut away to provide the same with end tongues and with shoulders at the inner ends of the tongues, said tongues being overlapped and having their free ends disposed in confronting relation to the shoulders, and a sealing strip adheringly secured against the outer side face of one tongue and extending in overlapping relation to the outer side face of the other tongue.

2. A packing ring formed from a laminated strip of flexible material, certain of the laminations having their end portions cut away to form longitudinally extending tongues on the projecting end portions of the other laminations, said tongues being disposed in overlapping relation to each other, the outer side face of said ring being formed with a longitudinally extending side face of one tongue and overlapping the outer side face of the other end portion of the ring.

WILLIAM B. WARE. 

